Here's why:
* Highly reactive: Fluorine is the most electronegative element, meaning it strongly attracts electrons. This makes it extremely reactive, readily forming bonds with other elements.
* Unstable alone: Fluorine atoms are very unstable on their own and will quickly bond with another fluorine atom to form a more stable diatomic molecule (F₂).
Therefore, you won't find fluorine in its atomic form in nature. It's always found as a gas composed of F₂ molecules.